Mary also came from a rich family and like Karen and Mel, got paid to be a teaching assistant. It’s not a ton of money, but it’s enough to pay for rent, food, and other expenses. Mary also had a rich fiancé (whom she was cheating on with the drug dealer Justin and boyfriend Chad). So, you’d think that with a job and rich people relatives giving her money, she’d be able to buy her own food, right? No. She was always stealing Karen’s food, to the point where Karen was only eating non-perishable food that she could keep in her room, because Mary would steal anything that Karen put in the fridge.